I have successfully compiled the WPS and WRF. When I compile the WRFPlus, I encounter a problem. The version of the WRFPlus is WRFV4.0. The complier I used is ifort. I have successfully compiled the wrfplus and the wrfplus.exe is generated in the main file. When I compile the all_wrfvar, errors are reported. The first error is "da_control.f(7): error #7002: Error in opening the compiled module file. Check INCLUDE paths. [DA_MODULE_DRIVER_CONSTANTS] use da_module_driver_constants, only : max_domains, max_eta, max_moves, max_bogus,". I have not found the DA_MODULE_DRIVER_CONSTANTS module. The detailed information is in the attachment including the configure and log file.